Abstract

The literature on parties suggests various hypotheses about the conditions under which the cohesion and discipline of parliamentary parties will be greater or lesser. Since one such hypothesis concerns party‐system characteristics, Italy offers an opportunity to investigate what happens to cohesion and discipline when a system characterised by the permanence in office of a large, centrally located party and based on the permanent exclusion of left and right extremes, is replaced by one characterised by strong bi‐polar tendencies and the alternation in office of two competing coalitions. Italy's transformation appears to have produced more cohesive and disciplined behaviour in parliament.